![]() ![]() Ring sample of a two-layered centrifugal casting pipe, ![]() In the same year, its production reached 1,000 tons a month, and Kubota established its status as a major manufacturer of the industry. ![]() At the World Foundry Congress in 1968, Kubota attracted the attention of each country and this triggered export expansion. This mill roll, which combined two different materials into one roll through centrifugal casting without separating them, achieved five times longer product life. Child high-alloy cast iron is used for the outer layer and high-grade cast iron for the inner layer. As different qualities are sought in steel mill rolls, Kubota continued its research and developed the world’s first commercialized centrifugal cast dual-layer mill roll. In 1954, Kubota developed ductile cast iron rolls with both excellent strength and durability, officially entering the iron and steel mill roll industry. Kubota Became a Leading Manufacturer in the Industry, Capturing Other Countries’ Attention G Column supporting the Shin-Osaka bullet train stationĬreated the World’s First Dual-Layered Roll Using Centrifugal Casting. It was widely used from skyscrapers to underground shopping centers and was selected by Nikkan Kogyo Shimbun (The Daily Industrial News, Ltd.) as “Top 10 New Products of the Year” in 1965. Kubota developed a mass-production system and released this product as a construction material. The G Column could adjust its thickness depending on its use and also demonstrated excellent strength. The resulting G Column had weld flanges, which connected the column and beams, cast together using centrifugal casting. Later, with its track record of supplying columns for Tokyo’s metro system as well, it collaborated with the Japanese National Railways Building Structure Research Institute and developed the columns for Tokaido Shinkansen’s Shin-Osaka Station in 1962. Selected as “Top 10 New Products of the Year”Īs Kubota’s centrifugal casting of steel pipes received good reviews, its cast steel columns were adopted for Osaka City’s subway station buildings. Steel casting-made paper suction roll shell in operationĮxpanded Its Products to Casting Materials for Civil Engineering and Construction. It was a moment in which Kubota’s decision to steer the company toward special cast steel in the beginning of its business bore fruit. In 1956, its record of producing cast steel pipes through centrifugal casting was recognized, and Kubota received the Incentive Award at the Mainichi Industrial Technology Award. Later, it developed pipes with such high-class alloy steel as nickel steel and chromium steel and began the domestic production of these special cast steel pipes, which were all dependent on imports. Before the war, Kubota became the first company in the country to succeed in manufacturing cast steel pipes applying the “centrifugal casting method,” which was first implemented in Asia as a technique to produce thin and long cast iron pipes. The First in the Country to Manufacture Steel Pipes Through Centrifugal Casting, Establishing Kubota’s Original Steel CastingĪfter the war, the cast steel business searched for a way to highlight Kubota’s originality. ![]()
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